Condition assessment of EPDM composite insulators using FTIR spectroscopy

Blackmore, P.; Birtwhistle, David; Cash, Gregory; George, Graeme A.

doi:10.1109/94.660819

Cited by 59 publications

(22 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ATR-FTIR spectra of RTVs aged by UV radiation, corona discharges, and elevated temperature and important IR absorptions for chemical bonds related to polydimethylsiloxane and aging products are shown in Fig. 13 [30]- [33]. It is observed that the absorption resulting from O-H bonds (hydroxyl groups) appear at the spectra of UV-aged RTV.…”

Section: Morphological and Chemical Changes At The Surface Layer Omentioning

confidence: 96%

Hydrophobic transfer of RTV silicone rubber aged in single and multiple environmental stresses and the behavior of LMW silicone fluid

Kumagai

Yoshimura

2003

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

This paper describes the hydrophobic transfer of unfilled room temperature vulcanized silicone rubber (RTV) resulting from UV radiation, corona discharges, high temperature, and a deposition of hydrophilic layer. The chemical and morphological structure at the surface layer and the migrating behavior of low molecular weight (LMW) silicone fluid from the bulk on to the surface top layer are investigated in order to elucidate the mechanism responsible for the hydrophobic transfer of RTV silicone rubber. It is shown that UV radiation and high temperature reduce highly mobile LMW silicone fluid, which reduces the recovery ability of the hydrophobicity. On the contrary, corona discharges produce highly mobile LMW silicone fluid that is formed as byproducts of corona aging, which promotes the hydrophobicity recovery and provides stability against other stresses.

show abstract

Section: Morphological and Chemical Changes At The Surface Layer Omentioning

confidence: 96%

Hydrophobic transfer of RTV silicone rubber aged in single and multiple environmental stresses and the behavior of LMW silicone fluid

Kumagai

Yoshimura

2003

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

show abstract

“…Fourier transform infrared (FTIR) analysis was conducted to study the change of Si-C, Si-O, -CH 3 , and -OH functional groups in RTV coating [20,21]. As shown in Figure 9, CH 3 , Si-C and Si-O absorbance peaks of superior layer are much lower than those of inferior layer, indicating the reduction of organic functional groups on RTV surface which could lead to the loss of hydrophobicity.…”

Section: Fourier Transform Infrared Analyisismentioning

confidence: 99%

Field aging investigation and filler precipitation analysis on RTV coated insulators in China

Chen

Jia

et al. 2014

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

Room temperature vulcanized (RTV) silicone rubber is a type of anti-pollution flashover coating which has been widely used in China. Featuring good hydrophobicity and adhesive property, RTV coatings are applied to insulators to increase the pollution flashover voltage of insulator strings. However, compared with high temperature vulcanized (HTV) silicone rubber used in composite insulators, RTV coatings are less durable in field operation. In this paper, investigation and experiments were conducted on some RTV coated insulators from Shanxi province and Guangdong province respectively. All the insulators have been in operation for about 6 years and the RTV coatings applied are produced by the same manufacturer. It is found that the performances of RTV coated insulators in Shanxi province are much better than those in Guangdong province. Phenomena such as chalking, color fading and peeling off were observed on RTV coated insulators from Guangdong whereas only slight loss of adhesion property and hydrophobicity were observed on insulators from Shanxi province. Micro structural analysis and macro performance tests were conducted on different positions of collected insulators and it is concluded that operation environment, especially humidity, have great impact on the operation performance of RTV coated insulators.

show abstract

“…Fourier Transform Infrared (FTIR) spectroscopy has been commonly used by researchers worldwide to characterize material degradation [5,6]. In this technique, the region of analysis is limited to a few microns below the sample surface.…”

Section: Introductionmentioning

confidence: 99%

Quantification of degradation in nonceramic housing materials by laser ablation

Pinnangudi

Gorur

Poweleit

2006

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

A laser irradiation technique has been explored to quantify visible as well as invisible degradation of housing materials used for nonceramic insulators. Nonceramic insulators that were removed from service and new samples of the housing that were subjected to accelerated testing in the laboratory have been evaluated. The method uses a constant power laser source for delivering the same energy to the test specimen. The proposed method is fairly quick and could be looked upon as an additional method for characterizing aging of nonceramic insulators. It has been shown that this method provides a better characterization of aging than is obtained from Fourier Transform Infrared Spectroscopy. The housing materials evaluated include silicone rubber, ethylene propylene diene monomer rubber and cycloaliphatic epoxy resin.

show abstract

Condition assessment of EPDM composite insulators using FTIR spectroscopy

Cited by 59 publications

References 16 publications

Hydrophobic transfer of RTV silicone rubber aged in single and multiple environmental stresses and the behavior of LMW silicone fluid

Hydrophobic transfer of RTV silicone rubber aged in single and multiple environmental stresses and the behavior of LMW silicone fluid

Field aging investigation and filler precipitation analysis on RTV coated insulators in China

Quantification of degradation in nonceramic housing materials by laser ablation

Contact Info

Product

Resources

About